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3 years ago

Peardeck - slide #21 - 7th-grade math - fill in the chart of negative and positive integers

Mathematics

1 answer:

Lunna [17]3 years ago

8 0

Answer:

lllllllllooooooooooollllllooolloollllll

Step-by-step explanation:

alkdndnbdnd

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13 please help ‍♀️‍♀️‍♀️‍♀️

bija089 [108]

2.5*(3+x)；2.5x+7.5

7.5+2.5x

so 2.5x+7.5=2.5+7.5

5 0

3 years ago

Read 2 more answers

Solve the system of equations by substitution. What is the solution for x?

insens350 [35]

Answer:

x=0.875

Step-by-step explanation:

2×+y=1

y=0.5

4×+2y=-1

4×+2.5=-1

1+2.5=4x

3.5=4x

x=0.875

5 0

3 years ago

Find the solutions for a triangle with a = 16, c =12, and B = 63º.

maks197457 [2]

Answer:

b. A = 71.6°; C = 45.40°; b =15.0

Step-by-step explanation:

The missing values can be found with the help of the Law of Cosine and properties of triangles:

Side b (Law of Cosine)

$b = \sqrt{a^{2}+c^{2}-2\cdot a \cdot c \cdot \cos B}$

$b = \sqrt{16^{2}+12^{2}-2\cdot (16)\cdot (12) \cdot \cos 63^{\circ}}$

$b \approx 15.022$

Angle A (Law of Cosine)

$\cos A = -\frac{a^{2} - b^{2}-c^{2}}{2\cdot b \cdot c}$

$\cos A = - \frac{16^{2}-15.022^{2}-12^{2}}{2\cdot (15.022)\cdot (12)}$

$\cos A = 0.315$

$A= \cos^{-1} 0.315$

$A \approx 71.639^{\circ}$

Angle C (Sum of internal angles in triangles)

$C = 180^{\circ} - 63^{\circ} - 71.639^{\circ}$

$C = 45.361^{\circ}$

Hence, the right answer is B.

6 0

3 years ago

Owen is signing up for a gym membership with a one-time fee to join and then a

Katena32 [7]

The cost of the monthly fee is 50$.. if the joining fee is 100.. take 200 and subtract that fee since it is included in the total. You’re left with 100. Note, the 200 is calculated for a 2 month period, so split the remaining 100 ,from the total 200, into 2. You’re left with 50 each month.

T=(C-100)/2 (T being 1 month) (C being the total cost/200)

Hopefully

3 0

3 years ago

223x12 please tell me I'm in my last question and dieing.

svlad2 [7]

Answer:

2,676

Step-by-step explanation:

2,676=223x12

7 0

3 years ago